Water treatment device



FIG. 1 is a perspective view of a water treatment device showing the new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a left side view thereof, the right side view being a mirror image of the left side view shown;

FIG. 5 is a bottom view thereof; and,

FIG. 6 is a top view thereof. 

The ornamental design for a water treatment device, as shown and described. 